A crew chief assigned to the 492nd Fighter Squadron Aircraft Maintenance Unit services the engine of an F-15E Strike Eagle at Royal Air Force Lakenheath, England, May 27, 2020. During a large force exercise with other U.S. Air Forces in Europe-Air Forces Africa units, 48th Fighter Wing aircrew conducted Dissimilar Air Combat Training in order to enhance combat readiness and increase tactical proficiency needed to maintain a ready force capable of ensuring the collective defense of the NATO alliance. (U.S. Air Force photo by Airman 1st Class Jessi Monte)